calaf

Factory modification - Calaf

1.Cancel vacuum tube input stage as well as relay based volume control system.

2.Using the highest up to date volume control chip PGA2310 instead for better bass and sound stage.

3.Adding a perfect temperature protection system to ensure the r eliability of power amplifier.

New Calaf use the highest quality volume control chip PGA2310 instead of original relay based volume system for better bass and sound stage, and add a perfect temperature protection system for better reliability. Opera audio will offer spare input and display PCB boards, for upgrade need.